Reaming-tool.



B. E. DAVIS,

REAMING TOOL.

APPLICATION FILED 1120.18, 1910.

1,046,739. I Patented Dec. 10, 1912.

MTNESSES wrap/70 EMERY 5. DflV/S .in a tool ofsmaller diameter.

n rrn STATES RATE T FFIC EMERY E. DAVIS, 01'? ST. LOUIS, MISSOURI, ASSIGNOR TO MATTHEWS-DAVIS TOOL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

. REAMING-TOOL.

Specification of Letters Patent.

Patented Dec. 10, 1912.

To all whom it may concern:

Be it known that I, EMERY E. DAVIS, a citizen of'the United States, residing at St. Louis, Missouri, have invented a certainnew and useful Improvement in Beaming-Tools, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is an elevation partly in section of a reaming tool of my improved construction. Fig. 2 is an end elevation of my improved tool. Fig. 3 is a perspective view of one of the blades or cutters forming a part of my improved tool. I

My invention relates to a metal working implement known as a reaming tool, and of the type utilizing a rotary head provided with a series of detachable and adjustable cutting blades.

The principal objects of my invention are first, to produce a comparatively simple inexpensive reaming tool, the parts of which can be easily and quickly assembled and adjusted; second, to provide simple means whereby the cutting blades can be expanded or adjusted outwardly to compensate for the wear and the grinding oil of the blades when sharpened; third, to. construct the tool so that all of the screw threads on the exterior v of the tool are covered and protected by the adjustable parts, and fourth, to construct the blades so that when the same are worn or ground away to the minimum for a certain sized tool they can be removed and utilized With the above objects in view my invention consists in certain novel features of constructionand arrangement of parts hereinafter more fully described and claimed.

Referring by numerals to the accompanying drawings 1 indicates the body of my improved tool which is in the form of a hollow cylinder and formed on the forward end of said body is a circular head; 2 of greater diameter than the main body of the tool. The interior of the central portion of the body is threaded as designated by 3 in order that the tool may be applied to a shaft or arbor. The mouth of the opening in the rear end of the tool is tapered as designated by 4:, so as to fit snugly against a corresponding portion ofthe arbor or shaft to which the tool is applied.

Formed in the head and in the outer face of the body '1 immediately adjacent said head is a series of longitudinally disposed slots 6 the bottoms of which incline slightly from their rear ends to their forward ends. These slots are formed at slight angles relative to radial lines extending from the axis of the tool and for this reason the cutters or blades located in said slots are held at such angles as to afford greatest cutting efiiciency while the tool is in use.

The cutters or blades 7 used in my improved tool are in the form of elongated plates of hardened metal adapted to fit snugly in the slots 6, and the inner edges of said blades or cutters are formed on slight angles corresponding to the inclination of the bottoms of said slots 6. The outer edges of the blades or cutters are beveled transversely so as'to form cutting edges 8.

A shallow groove 9 is formed in one of the side faces of each blade or cutter, and formed in the head 2 to one side of each slot 6 is a corresponding groove 10. When the cutters or blades are properly seated and adjusted in the grooves 6 taper.pins '11 are driven into the corresponding grooves 9 and 10, thus tending to force'the cutters down ward to a solid bearing in the groove 6 and rigidly holding said cutters in position on the tool.

Formed integral with the rear end of each blade or cutter is a hook-shaped lug 12, and each of said lugs is provided with an inclined or beveled face 13. The blade ad- Jjusting member of my improved tool comprises a sleeve 14 provided with an interior thread 15 which engages a corresponding thread 16 formed on the exterior of the rear portion of the body 1. The rear portion-of this sleeve is provided with an extension 17 which covers the-thread 16 when the nut is moved forward to its limit of movement, thereby protecting said thread and preventing the same from becoming mashed while the tool is in service.

The forward portion of the sleeve 14 is reduced in diameter and provided with an exterior thread 18 adapted to receive an internally threaded lock nut 19. The forward end of the sleeve 14 is rovided with an an? nular groove 20, whic receives the hook shaped legs 12 on the rear ends of the blades or cutters. The forward portion of the lock nut 19 is provided with a lip 21,- the inner face of which is beveled to correspond with the inclination of the beveled face 13 on the rear ends of the cutters.

A flange 22 formed on the rear portion of the lock nut 19 occupies a corresponding groove 23 formed in the adjusting sleeve 14 i The partsof my improved reaming tool,' when assembled, occupy the positions seen in Figs. 1 and 2, and to adjust the cutting blades after the same have been worn away.

through use or when ground ofi during -.the sharpening operation the lock nut 19 is loosened and unscrewed and during such movement it moves rearward upon the exteriorly threaded portion of the sleeve 14.

The taper pins are withdrawn from their seats in the coinciding grooves 9 and 10 and the sleeve 14 is now screwed forward upon the exteriorly threaded portion of the body 1, and such movement necessarily moves all of the cutting blades forward through the grooves 6. By reason of the inclination of the bottoms of the grooves 6 and the corresponding inclination of the inner edges of the cutters, said cutters will be moved out-v ward and thus they can be adjusted so as to effect a cut of the proper diameter.

After the cutters have been accurately adjusted the lock nut. 19 is moved forward until the beveled inner face of the lip on the forward end of said nut bears. tightly against the beveled rear faces of the lugs 12; The taper pins are now seated in the corresponding grooves 9 and 10 to lock and seat the cutters firmly in the grooves and the tool is now ready to be placed on the shaft or arbor and used.

A reaming tool of my improved construction is comparatively simple, comprises a minimum number of arts, can be easily and quickly adjusted anti after being worn to the minimum limit for a tool of certain size can be utilized in a tool of smaller diameter, thereby effecting a considerable saving in the cost in blades or cutters, where a number of tools of various diameters are in use.

The rear or upper end of the sleeve 14 is beveled as shown in Fig. 1, and arranged on 4 this beveled face isa raduated scale comprising a series of radially arranged marks a. Arranged on the rear end of the body 1 1s a single mark 6, which serves as a guide for the graduated scale on the sleeve 14.

the blades or cutters The marks a are preferably spaced apart a distance corresponding to a variatlon of onethousandth of an inch in the diameter of the cut made by the blades 7 ,hence when the sleeve 14 is moved forward on, the body 1 the-blades will be moved forward a distance of one-thousandth of an inch, thereby increasing the diameter of the cut of said blades. Such an arrangement avoids the necessity of caliper-ing the'opening and then calipering the blades, and repeating these operations until the blades have been properly-adjusted. If the diameter of the desired opening is not. the proper size it is a comparatively easy matter to adjust .the positions of the blades by manipulating the sleeve 14 and set-tingthe same, and consequently adjusting the positions of the blades by means of the'micrometeradjustment.

Itwill be readily understood that-minor changes in theform and construction of the various parts of my tool may be made and substituted for those herein shown and described jwitho-utdeparting from the spirit of my invention the scope ofwhich is set forth in the appended claims. 1

I claim:

1. In a reaming tool alslotted body, blades seated in the slots'of the body, a member screw-seated on the body and connected to the blades for moving the same through the slots and a member screw-seated on the first mentioned member for locking the blades to said first mentioned member.

2. In a reaming tool a slotted body,-blades seated in the slots of the body, a sleeve ad- 'justable lengthwise on the body and connected to the blades for simultaneously moving the same through the slots and a looking member mounted to move lengthwise on the sleeve and to simultaneously engage and look all oftlie blades to the sleeve.

3. In a reaming tool a body provided with slots having inclined bottoms, plates arranged in the slots-of'the body, a sleeve adjustable lengthwise on the body and con- .nected to the plates for simultaneously moving, the same lengthwise through the slots, a locking member mounted to move-lengthwise on the sleeve for simultaneously engaging and locking all of the plates against longitudinal movement, and independent means positioned between each plate and the slotted body for locking the plates to the body.

4. In a reaming tool a slotted body, blades seated in theslots of thebody, a member arranged to move lengthwise on the body and connected to the blades for moving the same through the slots and a member positioned'on the first mentioned member for longitudinal movement thereof, and which second mentioned member is adapted to engage the blades and lock the same to the.

first mentioned member.

5. In a reaming tool, a slotted body, plates seated in the slots of the body, a sleeve adjustably mounted on the body and connected to the plates for moving the same lengthwise through the slots, a locking ring adjustably mounted on the adjustable member for engaging the plates to lock the same to said adjustable member, and a pin inserted between each plate and the body for locking the plates to said body.

6. In a reaming tool, a body provided with slots, the bottoms of which are inclined, blades positioned in said slots, an adjusting member on the body, which adjusting member is connected to and adapted to simultaneously move all of the blades, a ring adjustably positioned on the adjusting member for locking the blades thereto and means for independently locking the blades to the body after adjustment.

7. In a reaming tool a body, a series of blades arranged thereon, a member screwseated on the body for simultaneously adjusting the positions of the blades and an extension on said member for covering and protecting the screw threads on the body when the adjusting member is moved to its forward limit of movement.

8. In areaming tool, a body, a series of blades-arranged thereon, a member screw seated on the body for adjusting the blades, an extension on said adjusting member for coverlng and protecting the screw threads on the body when the adjusting member is moved to its forward limit of movement, and a locking member screw seated on the adjusting member for engaging the blades and locking the same to the adjusting member, a portion of which locking member is extended to cover and protect the screw threads on the adjusting member.

'9. In a reaming tool the combination with a series of blades and a member connected thereto for simultaneously adjusting said blades, of a ring screw-seated on the adjusting member for locking the blades thereto, and an extension on the locking ring whereby the screw threads on the adjusting member are covered and protected when the looking ring engages and locks the blades to the adjusting member.

10. In a reaming tool a tubular body, one end of which body is provided with a series of longitudinally disposed slots, blades seated in'said slots, an adjusting member screw-seated on the tubular body and connected to all of the blades for simultaneously adjusting the positions of the same in the slots and a ring screw-seated on the adjusting member for locking the blades thereto, one end of which ring-overlies the ends of the blades.

11. In a reaming tool, a slotted body, plates seated in the slots of the body, a member screw seated on the body and connected to the plates for moving the same through the slots, a ring screw-seated on said member for locking the plates thereto, which member is provided on one end with an annular micrometer scale for regulating the adjusting movement of said member and there being an indicating mark formed on the slotted body which mark forms a guide for the micrometer scale on the adjusting member.

In testimony whereof I hereunto alfix my signature in the presence of two witnesses, this 14th day of December, 1910.

EMERY E. DAVIS.

Witnesses:

M. P. SMITH, ALMA GEBHART. 

